Patents by Inventor John Ledford

John Ledford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11941632
    Abstract: A real-time system and method for invoking a fraud alert notification to a bank prompted by an abandoned deposit following a denied accelerated funding request for a financial item.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: March 26, 2024
    Inventors: Dyron Clower, John Templer, La Shonna Sharp, Aaron Calipari, Michael Ring, Michael Serrette, Nickolas Ledford, Lawrence Dugger, Rodney Drake, Diana Hayes
  • Patent number: 10710344
    Abstract: A membrane system, having a waterproof woven polymer reinforcing scrim disposed between two layers of a thermoplastic polymer membrane; and an optional layer of concrete activated adhesive applied on top of a center portion, but not to the edges of the thermoplastic polymer membrane so that the edges of adjacent membranes can be thermally welded together to form a waterproof seal for use in blindside waterproofing or roofing applications.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: July 14, 2020
    Assignee: CARLISLE CONSTRUCTION MATERIALS, LLC
    Inventors: John Ledford, Brian Gish, Ross Vinson, Tony Vitale, Peter DiGiovanni, Justin Tepera, Steve Velten
  • Publication number: 20200171805
    Abstract: A membrane system, having a waterproof woven polymer reinforcing scrim disposed between two layers of a thermoplastic polymer membrane; and an optional layer of concrete activated adhesive applied on top of a center portion, but not to the edges of the thermoplastic polymer membrane so that the edges of adjacent membranes can be thermally welded together to form a waterproof seal for use in blindside waterproofing or roofing applications.
    Type: Application
    Filed: November 26, 2019
    Publication date: June 4, 2020
    Applicant: CARLISLE CONSTRUCTION MATERIALS, LLC
    Inventors: John LEDFORD, Brian GISH, Ross VINSON, Tony VITALE, Peter DIGIOVANNI, Justin TEPERA, Steve VELTEN
  • Publication number: 20070249491
    Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.
    Type: Application
    Filed: May 24, 2007
    Publication date: October 25, 2007
    Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
  • Publication number: 20070238904
    Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.
    Type: Application
    Filed: May 24, 2007
    Publication date: October 11, 2007
    Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
  • Publication number: 20070066856
    Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst is a SALEN-type compound which contains an amino group and an oxy or hydroxy group connected by a hydrocarbon, such as an alkyl or an alkylaryl. The SALEN-type compounds may be Schiff bases, i.e., a condensate product of a primary amine with an aldehyde, ketone or an alcohol. The SALEN-type compound may be a mono or bis compound and may be complexed with a Group 4-14 metal, such as aluminum, tin, vanadium, chromium, manganese, iron, cobalt or platinum.
    Type: Application
    Filed: October 2, 2006
    Publication date: March 22, 2007
    Inventors: Jaap Van Hal, John Ledford, Xiankuan Zhang
  • Publication number: 20070003764
    Abstract: A nonblocking coated elastomeric film comprises an elastomeric polymer film layer and a nonblocking solvent-based coating layer. The coating layer comprises a nonblocking coating component. The coating layer may be applied to one or both surfaces of the elastomeric polymer film layer.
    Type: Application
    Filed: June 1, 2006
    Publication date: January 4, 2007
    Inventors: Iyad Muslet, Robert Tomany, James Merrill, Max Hufferd, David Bland, John Ledford, Arrigo Jezzi
  • Patent number: 7084216
    Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: August 1, 2006
    Assignee: Saudi Basic Industries Corporation
    Inventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M. Hamed, Raju Raghavan, Sameh Rizkallah
  • Publication number: 20060122437
    Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst contains an amphoteric compound, such as such as (ethylenedinitrilo) tetraacetic acid (EDTA). These befunctional compounds have both acid and base moieties. Preferably, a compound useful in the present invention forms a buffered solution in water, i.e., the acid and base moieties do not completely disassociate. The pH of the buffered solution should be 2-10, preferably 5-10, more preferably 4-9. A compound useful in the present invention is preferably organic with the base moiety and the acid moiety being separated by one to four carbon atoms.
    Type: Application
    Filed: December 7, 2004
    Publication date: June 8, 2006
    Inventors: John Ledford, Jaap Van Hal, Xiankuan Zhang
  • Publication number: 20060069293
    Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst is a SALEN-type compound which contains an amino group and an oxy or hydroxy group connected by a hydrocarbon, such as an alkyl or an alkylaryl. The SALEN-type compounds may be Schiff bases, i.e., a condensate product of a primary amine with an aldehyde, ketone or an alcohol. The SALEN-type compound may be a mono or bis compound and may be complexed with a Group 4-14 metal, such as aluminum, tin, vanadium, chromium, manganese, iron, cobalt or platinum.
    Type: Application
    Filed: September 30, 2004
    Publication date: March 30, 2006
    Inventors: Jaap Van Hal, John Ledford, Xiankuan Zhang
  • Publication number: 20060041173
    Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst contains amines which are weak bases, specifically having pKa of at least 5.5, preferably 8 to 11. The amines may be primary, secondary, tertiary or a blend thereof or may be a compound having a structural combination of primary, secondary and/or tertiary amines.
    Type: Application
    Filed: August 23, 2004
    Publication date: February 23, 2006
    Inventors: John Ledford, Jaap Van Hal, Xiankuan Zhang
  • Patent number: 7001862
    Abstract: The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising at least one aluminum compound; and to a method for preparing a catalyst composition according to the present invention, comprising the steps of: (a) combining the components of the solid catalyst precursor; and (b) activating the catalyst precursor with aluminum compound.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: February 21, 2006
    Assignee: Saudi Basic Industries Corporation
    Inventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M. Hamed
  • Publication number: 20050159621
    Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.
    Type: Application
    Filed: March 14, 2005
    Publication date: July 21, 2005
    Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
  • Publication number: 20050137422
    Abstract: A one-step vapor phase oxidation process produces an unsaturated carboxylic acid, such as acrylic acid or methacrylic acid, from an alkane, such as propane or isobutane, with a mixed metal oxide catalyst and an excess of alkane relative to oxygen. The unreacted alkane and the byproduct alkene are recycled to the reaction zone without separation. Overall yield and productivity of the unsaturated carboxylic improves for such a process. An analogous method for the preparation of unsaturated nitrites is also disclosed.
    Type: Application
    Filed: December 19, 2003
    Publication date: June 23, 2005
    Inventors: Paulette Hazin, Frederick Galloway, John Ledford, Andy Nuyen
  • Publication number: 20050101749
    Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.
    Type: Application
    Filed: January 30, 2002
    Publication date: May 12, 2005
    Inventors: Akhlaq Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass Hamed, Raju Raghavan, Sameh Rizkallah
  • Patent number: 6847515
    Abstract: Power supply systems and methods can enable an electromagnetic device, such as an electrical contactor, to ride-through both voltage sags and dropouts. In an illustrative embodiment, a rectifier is used to generate a DC input voltage from an AC supply voltage. An interface circuit supplies the DC input voltage to an electrical contactor to provide the necessary power for operating the contactor. In general, an electrical contactor that is intended to operate from an AC voltage will operate equally well from a lower magnitude DC voltage. The interface circuit uses this difference in magnitudes between the AC voltage source and an operationally equivalent DC voltage source to maintain the DC input voltage at a desired level even if the AC voltage source sags below its normal operating level. In addition, an energy storage device may be used to store at least some of the DC input voltage.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: January 25, 2005
    Assignee: North Carolina State University
    Inventors: Arthur Kelley, John Ledford, Luca Vassalli, John Cavaroc
  • Patent number: 6800581
    Abstract: The present invention relates to a catalyst composition for homopolymerization or copolymerization of olefins comprising: (a) a solid catalyst precursor comprising a transition metal compound of group IVB, VB, or VIB of the periodic table, a magnesium compound and aliphatic polyketone particles; and (b) a cocatalyst comprising an aluminum alkyl, an aluminoxane or mixtures thereof; and a process for homopolymerisation or copolymerisation of olefins.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: October 5, 2004
    Assignee: Sabic Basic Industries Corporation
    Inventors: John Ledford, Mansour I. Taftaf, Syriac Palackal, Atieh Abu Raqabah, Akhlaq A. Moman, Orass M. Hamed, Navin Nallaveerapan
  • Publication number: 20040106513
    Abstract: The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising at least one aluminum compound; and to a method for preparing a catalyst composition according to the present invention, comprising the steps of: (a) combining the components of the solid catalyst precursor; and (b) activating the catalyst precursor with aluminum compound.
    Type: Application
    Filed: January 8, 2004
    Publication date: June 3, 2004
    Inventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M Hamed
  • Publication number: 20030073569
    Abstract: The present invention relates to a catalyst composition for homopolymerization or copolymerization of olefins comprising: (a) a solid catalyst precursor comprising a transition metal compound of group IVB, VB, or VIB of the periodic table, a magnesium compound and aliphatic polyketone particles; and (b) a cocatalyst comprising an aluminum alkyl, an aluminoxane or mixtures thereof; and a process for homopolymerisation or copolymerisation of olefins.
    Type: Application
    Filed: August 30, 2002
    Publication date: April 17, 2003
    Inventors: John Ledford, Mansour I. Taftaf, Syriac Palackal, Atieh Abu Raqabah, Akhlaq A. Moman, Orass M. Hamed, Navin Nallaveerapan